This was overlooked in the move to Python 3
(From OE-Core rev: 2ec8db434c6da54333cbdc54763bb5561b6e4d10)
Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>